Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 80

    SEO

    Google-friendlier than
    42% of websites

alzheimersdata.org

Alzheimer's Disease Data Initiative (ADDI) - Transforming research

Page Load Speed

648 ms in total

First Response

21 ms

Resources Loaded

532 ms

Page Rendered

95 ms

alzheimersdata.org screenshot

About Website

Click here to check amazing Alzheimer S Data content for United States. Otherwise, check out these important facts you probably never knew about alzheimersdata.org

We are moving Alzheimer’s disease (AD) innovation further by connecting researchers to the data they need to generate insights for AD and dementia.

Visit alzheimersdata.org

Key Findings

We analyzed Alzheimersdata.org page load time and found that the first response time was 21 ms and then it took 627 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

alzheimersdata.org performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value12.0 s

0/100

25%

SI (Speed Index)

Value5.5 s

55/100

10%

TBT (Total Blocking Time)

Value1,540 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.484

17/100

15%

TTI (Time to Interactive)

Value13.5 s

11/100

10%

Network Requests Diagram

alzheimersdata.org

21 ms

branded-short-domains-powered-by-bitly

63 ms

1709847777-css89e069520d1b228e37d6efd6832293904688fcbba0e7641976f77a7e4dc4f.css

32 ms

jquery.min.js

51 ms

1709847777-js93dbb5a10d2071497828496fbd530829ce89afbeeca86a552c83a5ff902c5f.js

56 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Alzheimersdata.org, 67% (20 requests) were made to Docrdsfx76ssb.cloudfront.net and 17% (5 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (446 ms) relates to the external source Js-eu1.hs-scripts.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 51.7 kB (24%)

Content Size

216.5 kB

After Optimization

164.9 kB

In fact, the total size of Alzheimersdata.org main page is 216.5 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Javascripts take 98.4 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 41.0 kB

  • Original 52.6 kB
  • After minification 52.5 kB
  • After compression 11.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 41.0 kB or 78% of the original size.

Image Optimization

-38%

Potential reduce by 8.1 kB

  • Original 21.6 kB
  • After minification 13.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Alzheimer S Data needs image optimization as it can save up to 8.1 kB or 38% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 1.4 kB

  • Original 98.4 kB
  • After minification 98.4 kB
  • After compression 97.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-2%

Potential reduce by 1.1 kB

  • Original 43.9 kB
  • After minification 43.9 kB
  • After compression 42.9 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Alzheimersdata.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 11 (39%)

Requests Now

28

After Optimization

17

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alzheimer S Data. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

alzheimersdata.org accessibility score

100

Accessibility Issues

Best Practices

alzheimersdata.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

alzheimersdata.org SEO score

80

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alzheimersdata.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Alzheimersdata.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Alzheimer S Data. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: